Hi Xmod08,
Currently realestate.com.au does not support export of listings to client sites.
What your client may need to do is move to a CRM provider or similar which provide portal export to domain, realestate.com.au and other portals.
Your WordPress real estate website would then become a mini portal which the provider you choose would also send REAXML files to. REAXML is a push system that our extension FeedSync parses and prepares for import.
See How to Import REAXML files into Your WordPress Real Estate Website
List of REAXML CRM providers can be found here.
As your question is not support related to the Easy Property Listings plugin, better that you fill in a pre-sale form here and we can continue to discuss your options.